>>49563983The right Vulpix isn't actually in the proportions of Zorua, whose head is bigger because it's closer, which you would see better if you didn't cherrypick and actually used the official art. The paws are true though, but again, the right Vulpix's paws are exaggerated and not what Zorua's paws look like.
With the birds, I wholeheartedly agree, but this change began with Fletchinder. Pidgey-Pidove all have realistic feet and proportions. So the line between new and old starters at Gen 6 in this regard.
With the crabs, the right image of Crabrawler loses the boxing aesthetic while looking even busier than Krabby, while the right crabby looks even simpler than regular Crabrawler.
TL;DR: These mons were cherrypicked, and the new illustrations exaggerate generational differences in design language.